Ontario Energy Market Highlights - 2025-10-12
🌦️ Weather
Today, Ontario experienced a mix of weather conditions across its forecast zones. Toronto and Ottawa saw a high of 15°C with partly cloudy skies, while cities like London and Hamilton experienced slightly cooler temperatures of 13°C with a chance of light showers. As we approach the weekend, the weather is expected to remain relatively stable, with no significant changes that could potentially impact energy demand.
⚡ Demand
Today's peak demand reached 16238.0 MW at the 19th hour. The load curve exhibited a typical pattern, with demand gradually increasing throughout the day, peaking in the evening hours, and then tapering off. Looking ahead to the weekend, the forecast suggests a slight decrease in demand, aligning with typical weekend trends.
💰 Energy Prices
Energy prices showed some variability today, with Day-Ahead Market (DAM) prices ranging from $31.08 to $89.43, and Physical Delivery (PD) prices ranging from $30.98 to $71.25. The notable spike in DAM prices during the peak demand hours signals potential tight margins. However, the comparatively lower PD prices suggest a well-functioning market with no significant supply constraints.
🔋 Generation Mix
At HE17, the major contributors to Ontario's energy mix were Nuclear (8120 MW), Hydro (3773 MW), Gas (3380 MW), Wind (1530 MW), and Solar (104 MW). Wind and solar generation remained relatively stable throughout the day, with no significant peaks or lulls. The supply shifted smoothly, with nuclear and hydro providing a steady base, supplemented by gas, wind, and solar.
🚧 Planned Outages
Over the next 7 days, a few planned outages are scheduled across the province. While most of these are routine maintenance, there is a noticeable increase in planned outages for wind and gas generation. This could potentially impact the system's flexibility, especially during peak demand hours.
✅ Summary
Based on today's price and supply conditions, Ontario's grid appears to be well-balanced. However, the planned outages in wind and gas generation over the next week may introduce some moderate constraints during peak demand hours.
